/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.iotdb.db.queryengine.plan.relational.planner.assertions;

import org.apache.iotdb.db.queryengine.plan.relational.planner.OrderingScheme;
import org.apache.iotdb.db.queryengine.plan.relational.planner.Symbol;
import org.apache.iotdb.db.queryengine.plan.relational.planner.assertions.PlanMatchPattern.Ordering;

import java.util.List;

final class Util {
  private Util() {}

  static boolean orderingSchemeMatches(
      List<Ordering> expectedOrderBy, OrderingScheme orderingScheme, SymbolAliases symbolAliases) {
    if (expectedOrderBy.size() != orderingScheme.getOrderBy().size()) {
      return false;
    }

    for (int i = 0; i < expectedOrderBy.size(); ++i) {
      Ordering ordering = expectedOrderBy.get(i);
      Symbol symbol = Symbol.from(symbolAliases.get(ordering.getField()));
      if (!symbol.equals(orderingScheme.getOrderBy().get(i))) {
        return false;
      }
      if (ordering.getSortOrder() != orderingScheme.getOrdering(symbol)) {
        return false;
      }
    }

    return true;
  }
}
